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Central Distributor SEDD: Description of Data Elements

MDNUMTYPE1 - Physician 1 number type
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

Prior to 2001, this data element is called MDIDTYPE.

Some data sources use more than one coding scheme for the physician identifiers stored in the MDNUM1 and encrypted in MDNUM1_S. Coding schemes include hospital-assigned numbers, State license numbers, or the Universal Physician Identification Numbers (UPIN) used by HCFA. If the data source provides the information to identify which coding scheme is used, the information is retained in MDNUMTYPE1.

Uniform Values
VariableDescriptionValueValue Description
MDNUMTYPE1Physician 1 number typeHHospital-assigned number
NNational Provider Identifier (NPI)
SState license number
State Specific Notes


Beginning 2018, Arkansas no longer provides values for Physician 1 Number Type.

Value Description Value Description
Nothing to map to MDUMTYPE=H H Hospital-assigned number
NI National Provider Identifier (NPI) - 10 digit number N National Provider Identifier (NPI)
SL State License Number - Alpha and 4 digits S State license number
UP or 1G Universal Physician Identification Number (UPIN) - Alpha and 5 digits U UPIN
F1 Federal Taxpayer's Identification Number A Other values
SP Specialty License Number
Values other than listed above


Internet Citation: HCUP Central Distributor SEDD Description of Data Elements - All States. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 9/11/08